Transmission Parts GM 4L70-E 4L60-E 4L65-E 4L80-E 4L85-E Valve Body Electrical Wiring / Harness
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Symptoms:

  • Line pressure instability

4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E

EPC Solenoid Harness Adapter
Part No. 34435-01K

For use with early-style ('92–'02) EPC solenoid in late-style (’03-later) units, solenoid not included.

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GM 4L60-E, 4L65-E, 4L70-E, 4L80E-, 4L85-E transmissions have both early- and late-style EPC solenoids. The early-style (’92-’02) proved to be more reliable than the late (’03-later), but different pin/connector configurations prevented the use of early solenoids in late units. Sonnax EPC solenoid harness adapter 34435-01K allows plug-and-play installation of early-style solenoids into late-style units.

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

GM 4L80-E, 4L85-E, TH400 Valve Body Layout

GM 4L80-E, 4L85-E, TH400 Valve Body Layout

GM 4L60-E, 4L65-E, 4L70-E Valve Body Layout

GM 4L60-E, 4L65-E, 4L70-E Valve Body Layout
  • 4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E EPC Solenoid Harness Adapter 34435-01K
  • 4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E EPC Solenoid Harness Adapter 34435-01K

Related Sonnax Parts

Required

Recommended

4L60-E, 4L65-E Heavy Duty Remanufactured Valve Body GM053-HD

4L60-E, 4L65-E
Heavy Duty Remanufactured Valve Body GM053-HD

Fits ’96–’08 units. Enhanced input sprag and Forward Clutch durability by engaging overrun clutch in D3 1st and 2nd Gears. Includes heavy duty 2-3 shift valve for enhanced protection.

Required

Recommended

4L60-E, 4L65-E Heavy Duty Remanufactured Valve Body GM054-HD

4L60-E, 4L65-E
Heavy Duty Remanufactured Valve Body GM054-HD

Fits ’96–’08 units. Prevents input sprag and Forward clutch failure by engaging overrun clutch in D4 1st, 2nd and 3rd Gears and D3 1st and 2nd Gears. Includes fluid rerouting for additional D4 protection and new servo cushion spring to reduce downshift clunk.

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